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Results tagged with examples
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user 175352
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An example of a $T_1$ space where all closed $G_\delta$ sets are zero-sets, but it isn't normal
In Engelking's General topology, in the exercises section, there is Ju. M. Smirnov's characterization of normal spaces:
A $T_1$ space is normal iff the following properties hold (both):
Every closed …